Xcasting-mold



F. HACHMANN.

CASTING MOLD.

APPLICATION FILED JuLY 5.1918.

1,334,030. Patented Mar. 16,1920.

SHEETS-SHEET I. 7 6 Eg: 2

@r9 fr U f6 gf 7 if i r ,ff f -9 l? l I I f tirarmi F. HACHMANN.

CASTING MOLD.

APPLICATION FILED IuLY 5. 191s.

,334,03G. Patented Mar. 16,1920.

[ 2 SHEETS-SHEET 2.

w if e@ s 7/ s (30 W Kila/w nn'rrnn srarns PATENT onnicn.

FREDERICK HACHMANN, OF ST. LOUIS, llJIEGURI, SSIGNQR, BY MESNE ASSIGNMENTS,

TO NATIONAL METAL DIE FIGLI) CGI/[PA OF MISSOURI. Y

NY, 0F ST. LOUIS, 'ilIISSOURL A CORPORATION CASTING-FIGLI).

To all whom may concern:

Be it known that I, Fniinnnron HACH- inixs, a citizen of the UnitedStates, residing at the city of St. Louis and State et Missouri, have invented a new and useful Casting-Mold, of which the following` is a specication.

This invention relates to casting molds.

An object of the invention is to provide a casting mold oi'l novel construction for venting the gases therefrom below the level of the material in the mold.

Another object is toV provide a casting mold in which the mold cavity is formed in a non-metallic material and which has an inlet passage or gate formed through said material which will not chill the molten metal passing into the mold cavity. y

Another object is to provide a casting mold having an inlet passage or gate opening through the bottom wall ot the molt which is composed of non-metallic substance or material which will not chill the molten metal being poured into the mold, and a series of venting passages through the mold Wall for venting thev gases from the mold cavity below the level of the material in the mold cavity. 5

A. further object, of the invent-ion is to provide a mold having the novel and advantageous features of construction hereinafter described and claimed.

Figure 1 is a side elevation of my imy proved mold.

other side thereof.

Fig. 2 is an elevation looking toward an- Fig is an elevation oi one part of the umold, illustrating the mold cavities, the

gates for conducting the material into the mold cavities and the venting passages tor conducting the gases from the mold cavities kduring the operation of casting.

v7 7 of rig. 1.

Fio. 8 is a view of one of the castings made in the specific form of mold illustrated.

In the specificv form of mold shown there Specification of Letters Patent. Patented 313,1-, 16, 1920, Appiieation mea. July 5, isis.

Serial No. 243,450.

are tivo mold cavities l formed in a mold body composed of several sections of nonmetallic material such, for instance, as soap stone or saponite having matching recesses therein and placed together so that the recesses form the desired mold cavities. Although the mold cavities shown are of peculiar shape for casting articles oi the form shown in Fig. S, it will be understood that the invention 'is not restricted to casting articles of any particular shape; nor is the invention confined lto a mold having two mold cavities, i'or it is perfectly plain that the-.invention is not restricted to these details. From each mold cavity several series of venting passages 2 extend obliquely up- -vs'ardly and outwardly for conducting the from the mold cavity from below the level of the material being cast during the casting operation, and into outlet passages Asshown these passages may becom posedA of grooves formed in the contacting t'aces of the sections of material forming the mold cavity.

The bottom 3 of the mold is also coinposed. preferably of sectionsoi non-metallic substance such as soap stone or saponite having vgatesor passages 4t opening into the lower ends of the mold cavitiesv for delivermunication with a hopper 6 in which the molten metal is poured. l

The top 7 of the mold is also composed of sections of soap stone Vor saponite having relatively large openings 8 in communication with the upper ends of the mold cavities.A Y

The mold body is thus composed of several sections .vhich, when assembled and held together in proper relation, :torni Vmold cavities having inlet passages for conducting the.

moltenmetal into the cavities and venting" passages for the escape of the gases.' The mold sections are" held together in an appropriate metallic frame provided-for that .purpose.

The frame shown is of ythe built-up s,

type composed of a box-like bottom memberA 9 for receiving and retainingthe bottom 8 of the mold; two matching side members l0 detachably secured to the bottommember; and two top members 11 detachably secured to the side members. Asshown the side"4 pins 14 on one or the side members engag Y ing in holes 15 on the other sidv memlier to strengthen the frame. The top members of the 'frame are similarly secured to the side members by pins or lugs 1G on the top members engaging in holes in the side m mbers and by screws' 17 passing 'through p of the top members and enga ging in the si members lof the trame. The sectional trame thus constructed is held together by clamos composed of brackets 18 embracing the frame shown in Fig. 5 and equipped with clamping devices 19 in the form oit screws operable to press the iframe sections together and ,being releasable to permit sepa ration ot' the mold for removal et the articles cast, or other purposes.

:Layers 120 of asbestos or the like are placed between the side ot the built-up mold Viiidthe Sides ot the frame. it desirable to employ some. material having the elasth-v and heat nonconducting qualities oiI ashes tos in order to permit proper relative expansion and contraction and tov compensate for any variation since the coetiicientsot etc pansion Vand contraction of the non-metallic substances 1forming the mold body are dii"- ferent from the coeilicients oi expansion and contraction of the metallic frame.

As shown in Fig. 7, the sections of nonmetallic' material forming the mold bod;v maybe formed V`With tongues or projections j2l`to engage in appropriate channels in the adjacent parts of the trame in order to as- 1 sist in holding the parts properly together.

'A mold 01"' "this character produces 'astings of great vdensity and tensile strength vand ,Y e of porosity and is therefore highly useful for a variety of purposes. ln mentioning soapstone or saponite as appropriate material Yfrom which the mold bod),v may he constructed, it will be understood that l do not restrict myself to the use of such sigbstances only, since there may be a variety of approprialte substances which will not chill ,molten metal passing into the mold cav- Iiiv, kiefer@ the 'mold cavity is lld, but will permit the'mold cavity to be ,QQmpletely filled before the advance portion jottheinaterial begins to harden or solidify.

1 .Claim Y 1; A sections of lithic material arranged in side by side and superimposed relation and Vforroing. a mold cavity between them adapted to formV Ia `casting andhaving an open upper end, means forholding the sections oflithic vmatgferial in side by side and superimposed sehnen and@ passage :Oreilles ist@ the betctasting mold composed of separable Yand having an open upper end, means for holding the sections oit.' lithie material sidel by side, means for holding the sections ci:

lithic material in superimposed relation, and a passage opening into the bottom oi the mold. cavity through one vof the Walls there-- oi', for delivering molten material into the bottom ot the'mold cavity. y

3. Ai casting mold, Comprising a mold body composed of separable sections or" lithic mater al arranged side by side and i'orming a` mold between theija adapted to form a casting and having Yan open upper end, a passage in the lithic material opening into the bottom oit the moliL cavity, and a passage extending downwardly from the top of the mold body for delivering' the molten materia into said first-named passage.

i. A casting mold, comprising a mold n cody con'iposed of separable sections oit hic material arranged side by side and illorminn' mold cavity between them adapted to torni rcastingand yhaving an open upper lend, a passage in the lithic material opening con-eentrically into the mold rai through the bottom VWall thereof, and a p sage extending downwardly from the top of the mold cavity into saidiirst-named passage ttor delivering' the molten material into the first-named passage.

5. A casting mold, comprising a mold Y body composed of sections loit lithic material arranged side by side, and forming a series of mold cavities between them adapted vto form separate castings and having inlopen upper end, a.' passage in the lithic material opening into the bottom Vthereof each of saidi cavities, and a passage through the lithic material for delivering molten. material into the first-named passage.

6. casting mold, comprising a mold body composed of separable sections of lithic material arranged side by side 4and in superimposed relation iorming'a mold, a. series Voi"V cavities between them adapted to form separate castings, .a passage in the lithic material opening into said cavities, a'V

passage `for delivering molten material into 'the firsts-named passage, and venting' pasof mold cavities between them adapted to form separate castings, a passage in the mold body below said cavities and opening into the bottoms oi said cavities, a passage extending downwardly through the mold body from the upper end thereof opening into said iirst-named passage for delivering molten material into the lirst-named pasand venting passages extending upwardly and outwardly from said cavities through the mold 'body adapted to insure escape of the gases 'from said cavities during the casting operation.

8. A casting mold, composed of separa-ble sections of lithic material, each oi said separable sections being composed of a plurality of superimposed members; means for holding the members ot each section in superimposed relation; means for holding the separable sections side by side to form a. mold cavity; and a passage for delivering molten material into the bottom of the mold cavity.

9. A casting mold, comprising a mold body composed oi' separa-ble sections or' lithic material, each or' said sections being composed of a plurality ot superimposed members; means for holding the members of eachv section `in superimposed relation; means :tor holding the separable sections in side by side relation to form a mold cavity between them adapted to form a casting; venting passages exten-ding upwardly and outwardly from the mold cavity adapted to insure escape of the gases during the casting operation; and a passage between said sec-v tions for delivering molten material into the bottom of the mold cavity.

l0. A casting mold, comprising a mold body composed of separable sections, each of said sections being composed of a number ol" superimposed members; means for holding the members of each section in superimposed relation; means for holding said sections in side by side relation to form a plurality of mold cavities between them adapted to formseparate castings; a passage for conducting molten material to a point near the bottom of the mold body; and branches from said passage for conducting molten material into said mold cavities respectively.

ll. A casting mold, comprising a mold body composed of separable sections, each of said sections being composed of a number of superimposed members; means for holding the members of each section in superimposed relation; means for holding said sections in side by side relation to form a lplurality of mold cavities between them adapted to f orm separate castings; a passage for conducting molten material to a point near the bottom of the mold body; branches 

